Extracellular Biosynthesis of Bimetallic Au–Ag Alloy Nanoparticles

Abstract

The exposure of a mixture of 1 mM HAuCl4 and 1 mM AgNO3 solutions to different amounts of fungal biomass (Fusarium oxysporum) results in the formation of highly stable Au–Ag alloy nanoparticles with dimensions of 8–14 nm depending on metal molar fraction (see image). The amount of cofactor NADH released by the F. oxysporum fungus plays an important role in controlling the composition of the alloy nanoparticles. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2421/2005/z400053_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.